[Pharo-project] [Vm-dev] Debugging Cog crash

[Levente Uzonyi]

On Sat, 9 Apr 2011, Schwab,Wilhelm K wrote:

>
> Levente,
>
> Yes, I did follow your instructions, and got the same error message reported in the post I cited.  The solution only solution I have found to that problem is the get the image up and running and THEN attach gdb to it.  I can't do that, because the vm dies way too early for that to work.  So, I would need to attach, or find another solution to the problem.

See the best answer here:
http://stackoverflow.com/questions/2702628/gdb-cannot-find-new-threads-generic-error


Levente

>
> Bill
>
>
>
>
> Levente wrote:
>
> Did you follow my instructions? If so, then you don't have to attach at
> all, because you started the VM process from gdb, so gdb is attached to
> the process already. Just do exactly what I wrote and you'll have what you
> need.
>
> If you need more help, then try the following links (first hits for
> http://www.google.com/search?ie=UTF-8&q=how+to+use+gdb btw):
> - http://www.unknownroad.com/rtfm/gdbtut/gdbuse.html
> - http://www.cs.cmu.edu/~gilpin/tutorial/
>
>
> Levente
>
>
> ________________________________________
> From: pharo-project-bounces at lists.gforge.inria.fr [pharo-project-bounces at lists.gforge.inria.fr] On Behalf Of Schwab,Wilhelm K [bschwab at anest.ufl.edu]
> Sent: Saturday, April 09, 2011 8:19 AM
> To: Pharo-project at lists.gforge.inria.fr; Squeak Virtual Machine Development Discussion
> Subject: Re: [Pharo-project] [Vm-dev] Debugging Cog crash
>
> Is there a debug version of Cog that I can run on the box?  I have casually avoided learning how to build Cog in part because that means I can't hack the FFI plugin, which forces me to play by the rules on library paths/ldconfig, etc.  It also means that I don't have a build environment ready to go, so I can't readily add syslog() calls to bracket where it quits.  gdb isn't helping as described below.
>
> If there is something you want me to try, let me know.  We have a reproducible Cog crash.
>
>
> ________________________________________
> From: pharo-project-bounces at lists.gforge.inria.fr [pharo-project-bounces at lists.gforge.inria.fr] On Behalf Of Schwab,Wilhelm K [bschwab at anest.ufl.edu]
> Sent: Friday, April 08, 2011 6:03 PM
> To: Pharo-project at lists.gforge.inria.fr; Squeak Virtual Machine Development Discussion
> Subject: Re: [Pharo-project] [Vm-dev] FW:  Debugging Cog crash
>
> Levente,
>
> I follow on why my shell script did not work.  Your instructions got me going, but we still don't have an answer.  The vm is running, but I cannot attach:
>
>    http://lists.squeakfoundation.org/pipermail/vm-dev/2008-March/001840.html
>
>> From what I read, one answer is the get the image loaded and then attach - my problem is that the vm never gets far enough to actually load the image.
>
> Any ideas?
>
> Bill
>
>
>
>